How to defend the Flexbone?

Got a game in my OD coming up against Georgia Tech & I'm just curious what some of the best formations to defend the flexbone are? Been looking at the 4-4 & 4-3 Over mostly, I normally match personnel & go with 4-3, Nickel, or dime based on the number of receivers but I'm sure I'll need a focussed approach in this game.

I had SOME success against Wisconsin last night using the 4-3 Over Cover 1 Robber & playing as the FS. I like the over because it helps contain the right side of the line which I feel is kind of underpowered in the game for some reason.

Any thoughts are appreciated!

I hear the 4-4, and 4-2-5 make it really tough to run the flexbone with because it takes away the outside options. Don't have any experience against it myself since I've been playing mostly the CPU and the CPU can't run the flexbone worth a damn.